EP3830359B1 - Élément d'armature de béton - Google Patents

Élément d'armature de béton Download PDF

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Publication number
EP3830359B1
EP3830359B1 EP19845436.5A EP19845436A EP3830359B1 EP 3830359 B1 EP3830359 B1 EP 3830359B1 EP 19845436 A EP19845436 A EP 19845436A EP 3830359 B1 EP3830359 B1 EP 3830359B1
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EP
European Patent Office
Prior art keywords
chain
members
lengths
reinforcement assembly
formwork
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19845436.5A
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German (de)
English (en)
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EP3830359A4 (fr
EP3830359A1 (fr
Inventor
John Silva
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rioflex Ip Pty Ltd
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Rioflex Ip Pty Ltd
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Filing date
Publication date
Priority claimed from AU2018902801A external-priority patent/AU2018902801A0/en
Application filed by Rioflex Ip Pty Ltd filed Critical Rioflex Ip Pty Ltd
Publication of EP3830359A1 publication Critical patent/EP3830359A1/fr
Publication of EP3830359A4 publication Critical patent/EP3830359A4/fr
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Publication of EP3830359B1 publication Critical patent/EP3830359B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/043—Wire anchoring or tensioning means for the reinforcements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0627—Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
    • E04C5/0631—Reinforcing mats combined with separate prefabricated reinforcement cages or girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0636—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts
    • E04C5/064—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts the reinforcing elements in each plane being formed by, or forming a, mat of longitunal and transverse bars
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/142—Means in or on the elements for connecting same to handling apparatus
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires

Definitions

  • the present invention relates to a reinforcement assembly for a concrete structure and to a method of reinforcing a concrete structure.
  • the present disclosure relates to both precast concrete structures that are produced offsite and then transport and lifted into place onsite, as well as concrete structures that are poured into site-specific formwork and allowed to cure onsite.
  • the disclosure will be described with particular reference to concrete panels it should be appreciated that the concrete structure is not limited to this configuration and any shape or size of structure could be constructed using the reinforcement assembly of the present invention, including but not limited to bridges, floor structures, building structures, slabs, arches, roads, retaining walls and reinforcement for land surfaces.
  • the steel reinforcement bars, fibres or mesh therefore help to strengthen the otherwise brittle concrete material.
  • Prestressed steel cable and rods can be used for beams, floors and bridges, which have longer spans.
  • formwork is used to demarcate the extent of the concrete structure to be produced.
  • the concrete is poured into a reusable or single use mould.
  • the formwork or mould acts as a wall that supports the concrete until it has sufficiently set.
  • the ground surface is levelled and formwork is setup along the edges of the proposed slab to thereby form a box or enclosure.
  • the formwork is secured in place by pegs that are driven into the ground.
  • Reinforcement mesh is then positioned within the box on spacers or chairs and the concrete mixture is poured into the box to encase the reinforcement mesh therein.
  • the reinforcement mesh may be knocked out of position and therefore not be positioned at the optimal location within the concrete structure once cured. This lack of consistency can result in areas of weakness within the concrete structure.
  • Still another system is disclosed in WO 2013/192497 in the name of FROMSON, which teaches a tubular reinforcing core for a concrete structure and which discloses a reinforcement assembly according to the preamble of claim 1 and a method of reinforcing a concrete structure according to the preamble of claim 12.
  • Concrete structures are particularly susceptible to movement, especially to damage during an earthquake.
  • the existing reinforcement that is used is however relatively rigid and does not have the ability to accommodate large deformations, such as those caused during an earthquake. Accordingly, existing concrete structures, tend to develop fractures that can lead to catastrophic structural failure.
  • the present disclosure could broadly be understood to comprise a reinforced concrete structure comprising a reinforcement assembly embedded therein, the reinforcement assembly including first and second lengths of chain, wherein the first and second lengths of chain being pretensionable prior to forming the concrete structure.
  • a reinforcement assembly for a concrete structure being formed using a formwork or mould comprising:
  • the reinforcement assembly in accordance with claim 2, further includes:
  • the resiliently deformable member may in one form be a spring, such as but not limited to, a helical spring, or a block of resiliently deformable material.
  • the pretensionable member may, in one form, be a turnbuckle or other adjustable device.
  • the reinforcement assembly may include both pretensionable members and resiliently deformable members. In other forms the reinforcement assembly may include only pretensionable members or resiliently deformable members.
  • first lengths of chain are parallel and the second lengths of chain are parallel and at an angle to the first lengths of chain.
  • the first lengths of chain and second lengths of chain may be interwoven or overlayed to thereby form a crossed mesh configuration.
  • the first and second lengths of chain may also be joined or fixed at an intersection or intersections thereof.
  • the parallel second lengths of chain may be perpendicular to the parallel first lengths of chain.
  • the parallel second lengths of chain may be oblique to the parallel first lengths of chain.
  • first, second and third lengths of chain may be used to create generally triangular voids, vertically through the reinforcement assembly. Additional lengths of chain may also be interwoven or overlayed. The chain lengths may be positioned in a perpendicular, web or other predetermined configuration.
  • the individual first lengths of chain may be spaced apart along a generally horizontal plane and the individual second lengths of chain may be spaced apart along generally the same horizontal plane.
  • the different lengths of chain may extend along different planes that may be parallel with or offset from each other.
  • each of the first lengths of chain may be connected to respective first mounting blocks by respective pretensionable members and/or resiliently deformable members.
  • the opposite ends of each of the second lengths of chain may be connected to respective second mounting blocks by respective pretensionable members and/or resiliently deformable members.
  • the concrete structure includes two spaced apart first mounting blocks that are connected by the first lengths of chain, and two spaced apart second mounting blocks that are connected by the second lengths of chain, all of which are embeddable in the concrete structure.
  • the first mounting blocks may therefore be positioned adjacent either end of the first lengths of chain and second mounting blocks are positioned adjacent either end of the second lengths of chain.
  • first lengths of chain and/or the second lengths of chain may be connected directed to the respective first or second mounting blocks.
  • the resiliently deformable members are only positioned at one end of the respective first or second lengths of chain.
  • a first end of each of the first lengths of chain are tethered to a respective pretensionable member and/or resiliently deformable member, which is in turn connected to the first mounting block.
  • a plurality of first ends of the first lengths of chain are tethered to a coupling that is connectable to a single or multiple pretensionable member and/or resiliently deformable member.
  • a first end of each of the second lengths of chain may be tethered to respective pretensionable member and/or resiliently deformable member, or to a coupling that has a single or multiple pretensionable member and/or resiliently deformable member attached thereto.
  • a second tetherable end of each of the first lengths of chain and second lengths of chain may be connectable to a respective fixing point or points.
  • the second end of each of the first lengths of chain and second lengths of chain are tethered to respective mounting blocks either directly or collectively by way of respective pretensionable members and/or resiliently deformable members.
  • each link member or members includes a respective additional or alternate tensionable device that, in use, is positionable external to the formwork or accessible from an exterior thereof.
  • the link member or members may include a linkage that extends between a corresponding mounting block and a respective tensionable device.
  • the tensionable device is removable once the concrete structure has cured.
  • the link member or members is/are preferably constructed from a material that has low corrosion characteristics.
  • the opening through which the link member extends is sealable to inhibit corrosion of the reinforcement assembly embedded within the concrete structure.
  • the pretensionable member or members may bear against the formwork such that as the reinforcement assembly is tightened the mounting block is pulled towards the formwork or edge of the mould, to thereby tension the lengths of chain.
  • the link member or members may be coupled to a respective anchor that is positioned external of the formwork or mould, and at a distance therefrom.
  • the anchor may be a peg or stake that can be driven into the ground at a distance from the formwork.
  • the anchor may be a coupling that is connected to an existing structure.
  • one end of the first and/or second lengths of chain may be connected to an existing structure such as an existing concrete slab or an anchor point on a wall, foundation or other structure.
  • a pretensionable member and/or resiliently deformable member may be located at only one end of the first and second lengths of chain, or pretensionable members and/or resiliently deformable members may be located at both ends of the first and second lengths of chain.
  • the linkage extends through an opening in the formwork to thereby hold the mounting blocks at the correct height within the formwork and therefore within the resultant concrete structure.
  • the opening may be sealable with an appropriate plug.
  • the reinforcement assembly may include lifting couplings to permit the attachment of lifting lungs used to move precast concrete structures.
  • the lifting lugs may be removably attachable to the lifting couplings or the reinforcement assembly may include integral lifting lugs.
  • the lifting lungs are preferably connected to, at least some of, the lengths of chain thereby providing greater strength when lifting the precast concrete structure to avoid dropping of the concrete structure due to failure of the lifting lug or lugs.
  • an earthquake resistant structure incorporating the above reinforcement assembly.
  • an impact resistant structure incorporating the above reinforcement assembly, which inhibits damage that may occur when the structure is impact by an armament, such as a missile or explosive device.
  • the concrete structure may include a heat-proof coating, such as an intumescent coating that swells up when heated, thereby protecting the concrete in the event of a fire.
  • a heat-proof coating such as an intumescent coating that swells up when heated, thereby protecting the concrete in the event of a fire.
  • the concrete structure may incorporate a fire-retardant additive that inhibits or at least delays damage during a fire event.
  • the reinforcement assembly acts in a similar way to a shock absorber during an earthquake or when impacted, such as by a vehicle, missile or other armament.
  • a reinforced concrete structure comprising a reinforcement assembly embedded therein, the reinforcement assembly including first and second lengths of chain, a plurality of pretensionable members and/or resiliently deformable members, and a plurality of mounting blocks, wherein, in use, the pretensionable members and/or resiliently deformable members are positionable intermediate of the first length of chain or the second length of chain and one of the plurality of mounting blocks, whereby the first and second lengths of chain being pretensionable prior to forming of the concrete structure.
  • the reinforcement assembly further comprises mounting blocks, the link members being attached to the mounting blocks, and wherein the pretensionable members, and/or resiliently deformable members are positioned intermediate of at least one end of some of the lengths of chain and a corresponding mounting block.
  • parallel, spaced apart first lengths of chain are positionable perpendicular or at an angle to parallel, spaced apart second lengths of chain, and respective mounting blocks are positionable adjacent both ends or one end of each of the first and second lengths of chain
  • it includes the further step of interweaving or overlaying the first and second lengths of chain.
  • a plurality of third, or more, lengths of chain are interwoven with, or overlay, the first and second lengths of chain.
  • the method includes the step of using a crane to lift the concrete structure so that is can be positioned onsite, wherein lifting lugs are connectable to at least some of the lengths of chain.
  • a reinforcement assembly 10 is illustrated, which can be embedded in a concrete structure 12, demonstrating by way of examples, arrangements in which the principles of the present invention may be employed.
  • the concrete structure 12 may be poured into site-specific formwork 14, as illustrated in Figures 3 to 5 and allowed to cured onsite, or the concrete structure 12 is a precast concrete structure that is produced offsite within a mould or formwork and then transport and lifted into place onsite.
  • the formwork or mould serves the same function and therefore any reference to the formwork 14 throughout the specification also encompasses the idea of a mould.
  • the reinforcement assembly 10 includes a plurality of generally parallel spaced apart first lengths of chain 16a to 16f, each having opposite tetherable ends 18 and 20.
  • first lengths of chain 16a to 16f each having opposite tetherable ends 18 and 20.
  • the skilled addressee will appreciate that six first lengths of chain are illustrated in the figures but the number of first lengths of chain may be more or less than six.
  • First mounting blocks 22, 24 are locate adjacent each of the opposite ends 18, 20 of the first lengths of chain, collectively referred to as lengths of chain 16.
  • resiliently deformable members 26 are positioned intermediate of each end 18 and 20 of the first lengths of chain 16 and the respective first mounting block 22 or 24.
  • the resiliently deformable members 26 are connected to a corresponding fixing point 28 on the first mounting block 22 or 24.
  • the resiliently deformable members 26, as illustrated in the figures, may be a helical or coiled spring, however the reader should appreciate that other resiliently deformable members could be used without departing from the scope of the invention.
  • springs may be located at a distance from the mounting blocks and intermediate of portions of chain wherein two portions of chain form an elongate length of chain, or the springs may connect portions of chains that are perpendicular or at an angle to each other.
  • Figure 1 only illustrates the resiliently deformable members 26 that are connected to first mounting block 24, however it should be appreciated that first mounting block 22 may also have respective resiliently deformable members 26 attached thereto. Alternatively, only end 20 of the first lengths of chain 16 may have a resiliently deformable member 26 attached thereto and the other end 18 is simply connected directly to a fixing point on the mounting block 22.
  • the first mounting blocks 22, 24 each include couplings 30, 32, for engaging link members 34, 36, as illustrated in Figure 4 .
  • the assembly 10 further includes a plurality of generally parallel spaced apart second lengths of chain 38a to 38g each having opposite tetherable ends 40 and 42.
  • the skilled addressee will appreciate that seven second lengths of chain are illustrated in the figures but the number of second lengths of chain may be more or less than seven. As illustrated in the figures the number of first and second lengths of chain may be different, however it should be appreciated that the number of first and second lengths of chain may alternatively be the same.
  • Second mounting blocks 44, 46 are locate adjacent each of the opposite ends 40, 42 of the second lengths of chain, collectively referred to as lengths of chain 38.
  • resiliently deformable members 26 may be positioned intermediate of one or both ends 40, 42 of the second lengths of chain 38 and the respective second mounting block 44 or 46.
  • the resiliently deformable members 26 are connected to a corresponding fixing point 28 on the mounting block 22 or 24.
  • the second mounting blocks 44, 46 each include couplings 50, 52, for engaging link members 54, 56, as illustrated in Figure 4 .
  • Figure 2 illustrates the reinforcement assembly 10 embedded within the resultant concrete structure 12, showing a portion of the concrete structure 12 removed to show the reinforcement assembly 10 that is held in a tensioned condition therein.
  • Figure 2 also illustrates how the link members extend through the outer edge of the concrete structure 12. In the present figure only link members 36 and 54 are illustrated however the reader will appreciate that the same is true about link members 34 and 56.
  • the link members may end at the outer edge of the concrete structure 12, as illustrated in Figure 2 , or they may be cut so that they do not extend outwardly.
  • the link members 34, 36, 54, 56, are constructed from a material having low corrosion characteristics or a plug (not shown) may encase the link members to seal them from the external environment.
  • a site-specific formwork 14 is constructed using boards 60, 62, 64, 66, which are held in an upright position by stakes 68.
  • the site-specific formwork 14 is used to delineate the external edges of the concrete structure 12.
  • each of the boards 60, 62, 64, 66 have openings 70 through which a respective link member can pass to thereby hold the mounting blocks at the correct height within the concrete structure 12. In use the opening may be sealable with an appropriate plug 72, as shown in Figure 5 .
  • each of the link members 54 and 56 that are connected to mounting block 46 include an additional tensionable device 74 and a linkage 76.
  • the tensionable device 74 may be external to the formwork 14 as illustrated in Figure 4 , or it may be accessible from an exterior of the formwork 14.
  • the linkage 76 extends between the mounting block 46 and tensionable device 74.
  • the tensionable device 74 is coupled to an anchor stake 78 that is positioned external of the formwork 14 and at a distance therefrom.
  • the link members 34, 36, 54 and 56 attached to mounting blocks 22, 24, and 44 may have a similar configuration.
  • Figure 5 illustrates the formwork 14 once a concrete mixture has been poured.
  • the wet concrete is allowed to cure and then the tensionable devices 74 are released and detached from the linkage 76.
  • the boards 60, 62, 64, 66 can then be removed in a conventional manner. Since the concrete has now cured the reinforcement assembly 10 is held in a tensioned condition therein.
  • tensionable device 74 may not be secured to a stake 78, rather it may be configured to bear against the formwork 14 such that, as the lengths of chain are tensioned, the mounting blocks are pulled towards an adjacent board 60, 62, 64, 66 of the formwork 14.
  • a U-shaped steel channel RSJ column with holes could be fixed to the formwork 14 to provide an anchor point for a pretensionable member 79.
  • lengths of chain may also be connected at one or both ends to an existing structure such as an existing concrete slab or an anchor point on a wall or foundation (not shown).
  • Figure 6a illustrates an embodiment of the pretensionable member 79 that bears against the formwork 14.
  • the pretensionable member 79 comprises a threaded shaft 82, a hex nut 84 and washer 86.
  • the threaded shaft 82 is connected to linkage 76 that is in turn connected to the coupling 30, which in the present embodiment is connected directly to fixing point 28 for the spring 26 attached to the length of chain 16a.
  • the hex nut 84 is lightened onto the threaded shaft 82 as illustrated in Figure 6b , the mounting block 24 is pulled towards the board 62 that causes the length of chain 16a to be lightened.
  • the spring 26 is also caused to slightly extend or is at least put under tension.
  • the spring 26 in the situation where the spring 26 is caused to slightly extend, when the concrete mixture is poured it flows into the gaps between the coils and once hardened assists in maintaining the spring 26 in an expanded configuration. Therefore in the event of an earthquake or seismic activity it is envisaged that the spring 26 will be the first part of the reinforcement assembly 10 that will move and thereby allow a degree of movement within the concrete structure 12 that will inhibit catastrophic failure of the structure 12. The internal movement of a portion of the reinforcement assembly 10 within the concrete structure 12, when under extreme stress, will provide structures that have greater strength whilst improving seismic or impact resistance.
  • the first and second lengths of chain 16 and 38 are interwoven to thereby form a mesh.
  • the chain links 80 of the length of chain 16a pass under the chain links 80 of the length of chain 38b.
  • the chain links 80 of the length of chain 16a pass over the chain links 80 of the length of chain 38c.
  • This interweaving of the chain lengths 16, 38 increases the strength of the concrete structure 12 by inhibiting laminating of the concrete along horizontal lines of weakness that could lead to stress fractures.
  • the chains may only be partially interwoven, or overlay, or overlaying lengths of chain may be coupled to the underlying lengths of chain by a coupling or fixing clip or resiliently deformable member.
  • the reinforcement assembly 10 includes lifting couplings 88 to permit the attachment of lifting lungs 90 used to move the precast concrete structures 12.
  • the hoisting chains 92 of a crane (not shown) can be attached to lift and move the concrete structures 12.
  • the lifting lugs 90 are removably attachable to the lifting couplings 88.
  • the lifting lug 90 includes a threaded shaft 94 and flange 96 having eyelet 98 for attachment of the hoisting chains 92.
  • the threaded shaft 94 is configured to engage the threaded bore 100 of the lifting couplings 88, as shown in Figure 10 .
  • the lifting couplings 88 is connected directly to the length of chain 16b, however the reader will appreciate that the lifting couplings 88 may be connected to one of the mounting blocks 22, 24, 44 or 46.
  • one of the advantages with having the lifting lungs 90 connected to at least some of the lengths of chain is that the concrete structures 12 is more securely held while it is being moved because the lifting lungs 90 are connected to elements that extend through the body of the concrete panel 12.
  • Figure 11 illustrates another embodiment of the chain configuration showing first lengths of chain 16, second lengths of chain 38 and third lengths of chain 102 that are interwoven or overlayed to form generally triangular voids 104.
  • Figure 12 illustrates springs 26 that interconnect portions of chains that are at an angle to each other.
  • the reinforcement assembly 10 includes a resiliently deformable member in the form of an hourglass shaped spring 108 that is coupled at one end to a length of chain 16 and the other to the mounting block 24 by way of eye bolt 110.
  • the link member in the form of a cable 112 is connected to eye bolt 114, which is attached to the mounting block 24 on an opposite side.
  • the cable 112 passes through aperture 70 in the formwork board 62 and is coupled to eye bolt 116 that is connected to stake 78.
  • Figures 14 and 15 illustrate a similar configuration, to that of Figure 13 but where the pretensionable member is in the form of a turnbuckle 118, in place of the spring.
  • Figures 16 and 17 also illustrate the use of a turnbuckle 118, however in this configuration the turnbuckle 118 is connected to eye bolt 120 that engages through a rigid pipe 122.
  • An end 124 of the eye bolt 120 extends through aperture 70 in the formwork board 62 and is secured by nut 126.
  • the rigid pipe 122 may be constructed from metal and is configured to be retained within an edge of the concrete structure 12 once formed.
  • the eye bolt 120 is connected to a permanent structure such as an existing wall or support structure, in situations where the formwork board 62 in not required.
  • the outer eye portion 128 of the turnbuckle 118 extends through the aperture 70 in the formwork board 62.
  • the outer eye portion 128 of the turnbuckle 118 extends through the aperture 70 in the formwork board 62.
  • the outer eye portion 128 of the turnbuckle 118 when the concrete structure is sufficiently cured and the formwork board 62 is removed, by decoupled the outer eye portion 128 from the turnbuckle 118.
  • the remaining open hole (not shown) in the side of the concrete structure 12 may be sealed with a suitable caulking material, if required.
  • Figure 20 illustrates another embodiment of the reinforcement assembly 10 that include both a pretensionable member 118, in the form of a turnbuckle, and a resiliently deformable member 108, in the form of an hourglass helical spring.
  • a pretensionable member 118 in the form of a turnbuckle
  • a resiliently deformable member 108 in the form of an hourglass helical spring.
  • FIG 20 illustrates the use of a mounting block 24, the pretensionable member 118 may in another embodiment be connected directly to the cable 112.
  • Figures 21 to 24 illustrate alternate embodiments of the layout of the lengths of chain.
  • two overlaying lengths of chain 16 and 38 are used is a square lattice pattern.
  • Figure 22 illustrates additional lengths of chain 102 laid diagonally over the square lattice pattern of lengths of chain 16 and 38.
  • Figure 23 illustrates a generally square web shape configuration with intersecting lengths of chain 130, 132, 134, 136 and intersecting lengths of chain 138, 140, 142, 144.
  • Figure 24 illustrates additional lengths of chain 146 laid diagonally over the lengths of chain 16, 38 and 102 of Figure 22 .
  • additional reinforcement such as but not limited to mesh or wire, could be used without departing from the scope of the invention.
  • Figure 25 illustrates the test result of load vs deflection curve for a 100 mm thick slab containing the reinforcement assembly 10 of the present invention (chain slab) compared to a 100mm thick slab containing conventional reinforcement (conventional slab).
  • the conventional slab included reinforcement comprising 10 mm diameter bars at 200 mm spacing in longitudinal direction and 6 mm bars in transverse direction at 200 mm spacing.
  • the chain slab was cast with chains of 10mm diameter spaced 200 mm c/c similar to the control slab. Both slabs were 2.2 m x 0.9 m x 0.1 m size.
  • the ultimate load for chain slab was 43.3 kN as opposed to the control slab ultimate load of 33 kN.
  • the load versus deflection plot for all the panels is shown in Figure 25 .
  • the maximum load sustained by the control slab is 33 kN (W) (equivalent line load is about 16.5 kN/m) and the maximum deflection is 83 mm.
  • the maximum load sustained by the chain slab is 43.3kN (W) (equivalent line load is about 21.65 kN/m) and the maximum deflection is 92 mm.
  • W Equivalent line load
  • W Equivalent line load is about 21.65 kN/m
  • the chain reinforced slab exhibits a linear elastic behaviour until the failure load.
  • the chain reinforced slab can be analysed using conventional theoretical approaches, i.e. existing equations for moment capacities can be easily modified.
  • the normal slab exhibits a linear elastic behaviour until the peak load and then progresses to strain-hardening behaviour and failure.
  • this may suggest that the chain reinforced slab is stronger and elastic although the normal reinforced slab could be higher in stiffness in the initial stages.
  • the invention is able to provide a method and assembly for reinforcing concrete structures that has improved seismic resistance or impact resistance, and includes moveable or adjustable reinforcement elements that can be moved to accommodate services, such as plumbing, and assists in the optimal positioning of the reinforcement within the body of the concrete panel, without adversely affecting the overall strength of the structure.
  • the present invention is therefore suitable for use is earthquake prone regions and where the concrete structure is required to withstand or resist an impact from armaments or other impact.
  • resist incorporates the idea of minimising the resultant damage, such that the present invention reduces the probability of a catastrophic failure of the concrete structure occurring.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Claims (15)

  1. Ensemble de renfort (10) pour une structure en béton (12) formée en utilisant un coffrage ou un moule (14), comprenant :
    une pluralité de premières longueurs de chaîne (16) espacées présentant des extrémités opposées ancrables (18, 20) ; et
    une pluralité de secondes longueurs de chaîne (38) espacées présentant des extrémités opposées ancrables (40, 42), la pluralité de secondes longueurs de chaîne (38) étant positionnées selon un angle par rapport aux premières longueurs de chaîne (16) ;
    dans lequel, en cours d'utilisation, l'ensemble de renfort (10) est réglable pour prétendre les premières et les secondes longueurs de chaîne (16, 38) avant qu'un mélange de béton ne soit versé dans le coffrage ou le moule (14), moyennant quoi l'ensemble de renfort prétendu (10) est intégré dans la structure en béton obtenue (12),
    caractérisé en ce que l'ensemble de renfort comprend :
    un ou plusieurs premiers éléments prétensionnables, et/ou un ou plusieurs éléments déformables de manière élastique (26), fixés entre au moins une desdites extrémités ancrables (18, 20) des premières longueurs de chaîne (16) et un ou plusieurs premiers éléments de liaison (34, 36) ; et
    un ou plusieurs seconds éléments prétensionnables, et/ou un ou plusieurs éléments déformables de manière élastique (26), fixés entre au moins une desdites extrémités ancrables (40, 42) des secondes longueurs de chaîne (38) et un ou plusieurs seconds éléments de liaison (54, 56),
    dans lequel le ou les éléments de liaison (34, 36, 54, 56) peuvent être fixés à ou s'étendre à travers le coffrage ou le moule (14).
  2. Ensemble de renfort (10) selon la revendication 1, incluant en outre :
    un premier bloc de montage (22, 24) intermédiaire entre le ou les premiers éléments prétensionnables, et/ou le ou les éléments déformables de manière élastique (26) et le ou les premiers éléments de liaison (34, 36) ;
    un second bloc de montage (44, 46) intermédiaire entre le ou les seconds éléments, et/ou un ou plusieurs éléments déformables de manière élastique (26) et le(s) second(s) élément(s) de liaison ou (54, 56) ; et
    dans lequel le(s) premier(s) élément(s) de liaison (34, 36), et le(s) second(s) élément(s) de liaison (54, 56) sont fixés à ou s'étendent à travers le premier ou le second bloc de montage (22, 24, 44, 46) respectivement.
  3. Ensemble de renfort (10) selon la revendication 1, dans lequel l'élément ou les éléments déformable(s) de manière élastique (26) est/sont un ressort ou un ressort hélicoïdal ou un bloc de matériau déformable de manière élastique.
  4. Ensemble de renfort (10) selon la revendication 1, dans lequel l'élément ou les éléments prétensionnable(s) (26) est/sont un tendeur (118) ou un autre dispositif réglable.
  5. Ensemble de renfort (10) selon la revendication 1, dans lequel les premières longueurs de chaîne (16) sont parallèles et les secondes longueurs de chaîne (38) sont parallèles.
  6. Ensemble de renfort (10) selon la revendication 5, dans lequel les premières longueurs de chaîne parallèles (16) sont selon un angle par rapport aux secondes longueurs de chaîne parallèles (38), et sont entrelacées ou superposées pour former ainsi une configuration maillée croisée.
  7. Ensemble de renfort (10) selon la revendication 1, dans lequel lesdites longueurs de chaîne (16, 38) sont espacées le long d'un plan respectif généralement horizontal ou sont en butée.
  8. Ensemble de renfort (10) selon la revendication 1, dans lequel les extrémités ancrables opposées (18, 20) de chacune desdites premières longueurs de chaîne (16) sont connectées à de premiers blocs de montage respectifs (22, 24) par des éléments prétensionnables respectifs et/ou des éléments déformables de manière élastique (26), et les extrémités ancrables opposées (40, 42) de chacune des secondes longueurs de chaîne (38) sont connectées à de seconds blocs de montage respectifs (44, 45) par des éléments prétensionnables respectifs et/ou des éléments déformables de manière élastique (26).
  9. Ensemble de renfort (10) selon la revendication 1, dans lequel une extrémité ancrable (18, 20) de chacune des premières longueurs de chaîne (16) et des secondes longueurs de chaîne (38) sont connectées à un ou plusieurs points de fixation (28).
  10. Ensemble de renfort (10) selon la revendication 1, dans lequel l'élément ou les éléments de liaison (34, 36, 54, 56) incluent chacun un dispositif tensionnable supplémentaire ou alternatif respectif (74) adapté pour être extérieur au coffrage (14) ou accessible depuis l'extérieur de celui-ci.
  11. Ensemble de renfort (10) selon la revendication 1, dans lequel l'élément ou les éléments de liaison (34, 36, 54, 56) sont couplés à un ancrage respectif (78) qui, en cours d'utilisation, peut être positionné à l'extérieur du coffrage ou du moule (14), et à une certaine distance de celui-ci.
  12. Procédé de renfort d'une structure en béton (12) incluant les étapes consistant à :
    construire un coffrage temporaire (14), ou fournir un moule (14), qui détermine une limite d'une structure en béton souhaitée (12) ;
    positionner un ensemble de renfort (10) à l'intérieur du coffrage ou moule (14), l'ensemble de renfort (10) comprenant des longueurs de chaîne (16, 38),
    verser un mélange de béton dans le coffrage ou moule (14) pour former la structure en béton (12) ;
    permettre au mélange de béton de durcir ; et
    enlever le coffrage (14), ou enlever la structure de béton de l'intérieur du moule (14), dans lequel les longueurs de chaîne (16, 38) sont maintenues dans un état prétendu dans la structure de béton (12),
    caractérisé en ce que l'ensemble de renfort (10) comprend
    des éléments prétensionnables et/ou des éléments déformables de manière élastique (26), et des éléments de liaison (34, 36, 54, 56), configurés, en cours d'utilisation, pour s'étendre à travers ou sur le coffrage ou le moule (14), dans lequel les éléments prétensionnables et/ou les éléments déformables de manière élastique (26) sont positionnés de manière intermédiaire entre au moins une extrémité (18, 20, 40, 42) de certaines des longueurs de chaîne (16, 38) et les éléments de liaison (34, 36, 54, 56) ; et le procédé inclut l'étapes consistant à :
    ajuster les éléments de liaison (34, 36, 54, 56) et/ou les éléments prétensionnables (26) pour ainsi tendre les longueurs de chaîne (16, 38).
  13. Procédé selon la revendication 12, dans lequel l'ensemble de renfort comprend en outre des blocs de montage (22, 24, 44, 46), les éléments de liaison (34, 36, 54, 56) étant fixés aux blocs de montage, et dans lequel les éléments prétensionnables et/ou les éléments déformables de manière élastique (26) sont positionnés de manière intermédiaire entre au moins une extrémité (18, 20, 40, 42) de certaines des longueurs de chaîne et un bloc de montage correspondant (22, 24, 44, 46).
  14. Procédé selon la revendication 13, dans lequel des premières longueurs de chaîne espacées parallèles (16) peuvent être positionnées perpendiculairement ou selon un angle par rapport à des secondes longueurs de chaîne espacées parallèles (38), dans lequel des blocs de montage respectifs (22, 24, 44, 46) sont positionnés de manière adjacente aux deux extrémités ou à une extrémité (18, 20, 40, 42) de chacune des première et seconde longueurs de chaîne (16, 38).
  15. Procédé selon la revendication 12, incluant en outre l'étape consistant à utiliser une grue pour lever la structure en béton (12) de sorte qu'elle puisse être positionnée sur site, dans lequel des étriers de levage (90) peuvent être reliés à au moins certaines desdites longueurs de chaîne (16, 38).
EP19845436.5A 2018-08-01 2019-07-26 Élément d'armature de béton Active EP3830359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2018902801A AU2018902801A0 (en) 2018-08-01 Concrete reinforcement assembly
PCT/AU2019/050790 WO2020023999A1 (fr) 2018-08-01 2019-07-26 Élément d'armature de béton

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EP3830359A1 EP3830359A1 (fr) 2021-06-09
EP3830359A4 EP3830359A4 (fr) 2022-04-27
EP3830359B1 true EP3830359B1 (fr) 2024-04-17

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EP (1) EP3830359B1 (fr)
JP (1) JP7383691B2 (fr)
AU (1) AU2019313158A1 (fr)
CL (1) CL2021000223A1 (fr)
WO (1) WO2020023999A1 (fr)

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CN113235964B (zh) * 2021-05-11 2022-10-21 太原理工大学 提高h形钢柱局部稳定的混凝土紧固结构及其安装方法

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WO2020023999A1 (fr) 2020-02-06
CL2021000223A1 (es) 2021-08-13
JP7383691B2 (ja) 2023-11-20
JP2021533289A (ja) 2021-12-02
EP3830359A4 (fr) 2022-04-27
US20210270035A1 (en) 2021-09-02
EP3830359A1 (fr) 2021-06-09

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